High Speed and High Performance Optical Reflectometry for Diagnoses of Complex Fiber Optic Modules and Optical Fiber Subscriber Access Networks

本项目旨在为光纤通信行业中诸如掺铒光放大器（EDFA）、光纤用户接入网等复杂光纤模块的诊断等难题提供高效的解决方案，结合课题组独创的“光相干函数合成”（SOCF）技术，提出并建立了“多重光相关运算”技术。利用课题组前期提出的“波长扫描平均”方案，并在此基础上引入光谱apodization和自适应载波技术，实现高灵敏度、高精度、大动态范围、高速度、高空间分辨率的高性能光学反射仪。在实验演示中，在几秒内获得了高精度的光纤反射分布，而传统技术通常需要数百到数千秒。利用该高精度高速光反射测量系统，成功地对复杂光纤模块和光纤用户网络中的反射分布进行了测量。此外，新提出和演示的技术也有助于分布式和多路光纤传感器的发展。

Aiming at providing efficient solutions to the difficult problems in optical fiber communication industry, such as the diagnoses of complex fiber optic modules like erbium-doped optical amplifiers (EDFA) and optical fiber subscriber access networks, this project proposed and established the technique of "multiple optical-correlation operations" by merging the technique of "synthesis of optical coherence function" (SOCF), which is originally created by this research group, with the scheme of "wavelength sweeping averaging" developed by the head-investigator before, and by introducing the spectral apodization and adaptive carrier techniques additionally, to realize a high performance optical reflectometry with such functions in parallel as high sensitivity, high accuracy, large dynamic range, high speed, and fine spatial resolution. In experiment demonstration, a high accuracy reflection distribution of optical fiber is obtained within several seconds, which costs in general hundreds to thousand of seconds with conventional techniques. With this high-accuracy high-speed optical reflectometric system, the measurements for the reflection distribution in complex optical fiber modules and optical fiber subscriber networks are demonstrated successfully. In addition, the newly proposed and demonstrated techniques also contribute to the development of distributed and multiplexed fiber optic sensors.